public LazyValue(string expression, CalculationContext context)
{
this.context = context;
this.lastRequestWasType = false;
this.rawExpression = expression;
this.dirty = true;
var tokenizer = new Tokenizing.Tokenizer(expression, context.Config);
tokenizer.Run();
var parser = new Parsing.Parser(tokenizer.Tokens, context.Config);
this.evaluator = new PostFixEvaluator(parser.CreatePostFixExpression(), context);
this.BindEvents();
}
